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import pytest
from aiohttp import streams
DATA = b'line1\nline2\nline3\n'
def chunkify(seq, n):
for i in range(0, len(seq), n):
yield seq[i:i+n]
def create_stream(loop):
stream = streams.StreamReader(loop=loop)
stream.feed_data(DATA)
stream.feed_eof()
return stream
async def test_stream_reader_lines(loop):
line_iter = iter(DATA.splitlines(keepends=True))
async for line in create_stream(loop):
assert line == next(line_iter, None)
pytest.raises(StopIteration, next, line_iter)
async def test_stream_reader_chunks_complete(loop):
"""Tests if chunked iteration works if the chunking works out
(i.e. the data is divisible by the chunk size)
"""
chunk_iter = chunkify(DATA, 9)
async for data in create_stream(loop).iter_chunked(9):
assert data == next(chunk_iter, None)
pytest.raises(StopIteration, next, chunk_iter)
async def test_stream_reader_chunks_incomplete(loop):
"""Tests if chunked iteration works if the last chunk is incomplete"""
chunk_iter = chunkify(DATA, 8)
async for data in create_stream(loop).iter_chunked(8):
assert data == next(chunk_iter, None)
pytest.raises(StopIteration, next, chunk_iter)
async def test_data_queue_empty(loop):
"""Tests that async looping yields nothing if nothing is there"""
buffer = streams.DataQueue(loop=loop)
buffer.feed_eof()
async for _ in buffer: # NOQA
assert False
async def test_data_queue_items(loop):
"""Tests that async looping yields objects identically"""
buffer = streams.DataQueue(loop=loop)
items = [object(), object()]
buffer.feed_data(items[0], 1)
buffer.feed_data(items[1], 1)
buffer.feed_eof()
item_iter = iter(items)
async for item in buffer:
assert item is next(item_iter, None)
pytest.raises(StopIteration, next, item_iter)
async def test_stream_reader_iter_any(loop):
it = iter([b'line1\nline2\nline3\n'])
async for raw in create_stream(loop).iter_any():
assert raw == next(it)
pytest.raises(StopIteration, next, it)
async def test_stream_reader_iter(loop):
it = iter([b'line1\n',
b'line2\n',
b'line3\n'])
async for raw in create_stream(loop):
assert raw == next(it)
pytest.raises(StopIteration, next, it)
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